P0088 Continued
5th Wheeling
Joined: Jul 2014
Posts: 41
Likes: 2
Ford says anything plus or minus 10 on fuel trims you have a concern low fuel trims are caused by faulty injector or unmetered fuel entering cylinder which pcm responds by taking fuel away from cylinder a high fuel trim is cause by faulty injector as well and low compression when pcm sees a paticular cylinder not turning as fast as the others it will add more fuel to speed up that cylinder once pcm can no longer compensate for that cylinder the cel turns on and you will have cylinder contribution codes if it's severe enough it will also set misfire codes sometimes if metal is in the system it can intermittently hang inj open longer then should which results in more fuel causing that cylinder to speed up which pcm sees that in crank sensor signal and will put the truck in reduce engine power and wrench light will appear and code p252f engine oil level overfull thinking it's trying run away which in reality inj causing the problem
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Ok after emailing back an forth with mike from spartan diesel and talking to the tech working on my truck. I decided to go ahead and change the hpfp. The injector is out of spec. I'm getting the repair done cab off. To have one labor bill i'm having them put head studs in and they said it was no problem to do the egr & cooler delete. We believe hpfp pump is failing hence the change of pump and since one injector is acting up and needs replaced I'm just going to have them all changed. Figured again one labor bill and since one is out of spec and with failing pump others might not be far behind. Is there anything else i should consider while the cab is off? Thanks for all the info and help.
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Yeah i'm working on that. Thanks for the advise. Just wanted to address any weak points or common failures. I guess anything that would be good to inspect while easier to access or work while cab is off. Thanks
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Ok I'll do that. Looking for rust spots correct?
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
Rust spots or signs of lack of lube. When you do it post some pictures and I or someone that knows what they are looking at /or for can help.
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Ok will do. Thanks again
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Just some thoughts I had. If I find damage in hpfp from water. How do I prevent this from happening in next hpfp?? I drain the water separator once a month religiously. Change fuel filters every 10,000 miles. Always run a fuel additive in every tank of fuel. Yet still hpfp failure?
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Ok. Yeah i only buy my fuel from busy stations in my area.
Senior User
Joined: Nov 2009
Posts: 154
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After my clogged separator scare, I have gone to draining the water separator every 2-3 weeks. I have yet to get any water out of it but I drain out about a quart of fuel out of it anyway. I have also gone to changing the fuel filters every 5,000 miles instead of every 10,000.
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
[IMG]https://cimg4.ibsrv.net/Shop finally had room to get my truck in.
/www.ford-trucks.com-vbulletin/2000x1124/80-20140827_110625_2b658d48e915376c919ba98c77444da6e9 db12fa.jpg[/IMG]
Shop finally had room to get my truck in. Cab is up and valve covers off. Here's a couple pics of injection pump. Any input as to water damage?
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Information Junkie
Joined: Feb 2008
Posts: 151
Likes: 0
From: Port Austin MI
Here's a pic of my truck in the shop. There's a couple pics of the rocker arms on the driver side the coser pic shows what i believe to be a really wore down nub/tip on rocker arm. Is it better to try and change just the wore ones or can you get the whole thing as a unit? Also where would be a good place to get something like that?